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href="https://hu.wikipedia.org/wiki/Svecov_AS%E2%80%9321" title="Svecov AS–21 – Hungarian" lang="hu" hreflang="hu" data-title="Svecov AS–21" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%82%B7%E3%83%A5%E3%83%99%E3%83%84%E3%82%A9%E3%83%95_ASh-21" title="シュベツォフ ASh-21 – Japanese" lang="ja" hreflang="ja" data-title="シュベツォフ ASh-21" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/ASz-21" title="ASz-21 – Polish" lang="pl" hreflang="pl" data-title="ASz-21" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Shvetsov_ASh-21" title="Shvetsov ASh-21 – Portuguese" lang="pt" hreflang="pt" data-title="Shvetsov ASh-21" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%90%D0%A8-21" title="АШ-21 – Russian" lang="ru" hreflang="ru" data-title="АШ-21" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-tg mw-list-item"><a href="https://tg.wikipedia.org/wiki/Shvetsov_ASh-21" title="Shvetsov ASh-21 – Tajik" lang="tg" hreflang="tg" data-title="Shvetsov ASh-21" data-language-autonym="Тоҷикӣ" data-language-local-name="Tajik" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit 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<div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Soviet radial piston aircraft engine</div> <table class="infobox" style="width:25.5em;border-spacing:2px;"> <tbody><tr> <th colspan="2" style="text-align: center; font-size: 125%;">ASh-21 </th></tr> <tr> <td colspan="2" style="text-align: center;"><span typeof="mw:File"><a href="/wiki/File:Pet%C5%91fi_Csarnok,_Rep%C3%BCl%C3%A9st%C3%B6rt%C3%A9neti_ki%C3%A1ll%C3%ADt%C3%A1s,_%C5%A0vecov_A%C5%A1-21.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/32/Pet%C5%91fi_Csarnok%2C_Rep%C3%BCl%C3%A9st%C3%B6rt%C3%A9neti_ki%C3%A1ll%C3%ADt%C3%A1s%2C_%C5%A0vecov_A%C5%A1-21.JPG/300px-Pet%C5%91fi_Csarnok%2C_Rep%C3%BCl%C3%A9st%C3%B6rt%C3%A9neti_ki%C3%A1ll%C3%ADt%C3%A1s%2C_%C5%A0vecov_A%C5%A1-21.JPG" decoding="async" width="300" height="400" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/32/Pet%C5%91fi_Csarnok%2C_Rep%C3%BCl%C3%A9st%C3%B6rt%C3%A9neti_ki%C3%A1ll%C3%ADt%C3%A1s%2C_%C5%A0vecov_A%C5%A1-21.JPG/450px-Pet%C5%91fi_Csarnok%2C_Rep%C3%BCl%C3%A9st%C3%B6rt%C3%A9neti_ki%C3%A1ll%C3%ADt%C3%A1s%2C_%C5%A0vecov_A%C5%A1-21.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/32/Pet%C5%91fi_Csarnok%2C_Rep%C3%BCl%C3%A9st%C3%B6rt%C3%A9neti_ki%C3%A1ll%C3%ADt%C3%A1s%2C_%C5%A0vecov_A%C5%A1-21.JPG/600px-Pet%C5%91fi_Csarnok%2C_Rep%C3%BCl%C3%A9st%C3%B6rt%C3%A9neti_ki%C3%A1ll%C3%ADt%C3%A1s%2C_%C5%A0vecov_A%C5%A1-21.JPG 2x" data-file-width="1944" data-file-height="2592" /></a></span> </td></tr> <tr> <th>Type </th> <td><a href="/wiki/Radial_engine" title="Radial engine">Radial engine</a> </td></tr> <tr> <th>Manufacturer </th> <td><a href="/wiki/Shvetsov" class="mw-redirect" title="Shvetsov">Shvetsov</a> OKB-19 in Perm' </td></tr> <tr> <th>First run </th> <td>1945 </td></tr> <tr> <th><span class="nowrap">Number built</span> </th> <td>7,636 </td></tr> <tr> <th><span class="nowrap">Developed from</span> </th> <td><a href="/wiki/Shvetsov_ASh-82" title="Shvetsov ASh-82">Shvetsov ASh-82</a> </td></tr> </tbody></table> <p>The <b>Shvetsov ASh-21</b> is a seven-cylinder single-row air-cooled <a href="/wiki/Radial_engine" title="Radial engine">radial</a> aero engine. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Design_and_development">Design and development</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Shvetsov_ASh-21&action=edit&section=1" title="Edit section: Design and development"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The ASh-21 is basically a single-row version of the Shvetsov <a href="/wiki/Shvetsov_ASh-82" title="Shvetsov ASh-82">ASh-82</a>. The ASh-21 also incorporates a number of parts from the <a href="/wiki/Shvetsov_ASh-62" title="Shvetsov ASh-62">ASh-62</a> radial engine. Design began in 1945, and by 1947 testing had finished and production had begun. Between 1947 and 1955 7,636 ASh-21 engines had been built in the USSR and beginning in 1952 it was produced in <a href="/wiki/Czechoslovakia" title="Czechoslovakia">Czechoslovakia</a> as the <b>M-21</b>. </p> <div class="mw-heading mw-heading2"><h2 id="Applications">Applications</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Shvetsov_ASh-21&action=edit&section=2" title="Edit section: Applications"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Beriev_Be-8" title="Beriev Be-8">Beriev Be-8</a></li> <li><a href="/wiki/Beriev_Be-30" title="Beriev Be-30">Beriev Be-30</a> (prototype)</li> <li><a href="/wiki/Yakovlev_Yak-11" title="Yakovlev Yak-11">Yakovlev Yak-11</a></li> <li><a href="/wiki/Yakovlev_Yak-16" title="Yakovlev Yak-16">Yakovlev Yak-16</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Specifications_(Shvetsov_ASh-21)"><span id="Specifications_.28Shvetsov_ASh-21.29"></span>Specifications (Shvetsov ASh-21)</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Shvetsov_ASh-21&action=edit&section=3" title="Edit section: Specifications (Shvetsov ASh-21)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Shvetsov.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/40/Shvetsov.jpg/220px-Shvetsov.jpg" decoding="async" width="220" height="374" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/40/Shvetsov.jpg/330px-Shvetsov.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/40/Shvetsov.jpg/440px-Shvetsov.jpg 2x" data-file-width="1732" data-file-height="2947" /></a><figcaption>Family tree of Shvetsov engines</figcaption></figure> <p class="mw-empty-elt"> </p> <div class="mw-heading mw-heading3"><h3 id="General_characteristics">General characteristics</h3></div> <ul><li><b>Type:</b> Seven-cylinder, air-cooled, single-row, radial engine</li> <li><b><a href="/wiki/Bore_(engine)" title="Bore (engine)">Bore</a>:</b> 155.5 mm (6.12 in)</li> <li><b><a href="/wiki/Stroke_(engine)" title="Stroke (engine)">Stroke</a>:</b> 155 mm (6.10 in)</li> <li><b><a href="/wiki/Engine_displacement" title="Engine displacement">Displacement</a>:</b> 20.6 L (1,257 cu in)</li> <li><b><a href="/wiki/Dry_weight" class="mw-redirect" title="Dry weight">Dry weight</a>:</b> 487 kg (1,074 lb)</li></ul> <div class="mw-heading mw-heading3"><h3 id="Components">Components</h3></div> <ul><li><b><a href="/wiki/Supercharger" title="Supercharger">Supercharger</a>:</b> Single stage, single speed, geared centrifugal supercharger</li> <li><b>Fuel system:</b> Carburetor</li> <li><b>Cooling system:</b> Air</li></ul> <div class="mw-heading mw-heading3"><h3 id="Performance">Performance</h3></div> <ul><li><b>Power output:</b> <br /></li> <li>520 kW (700 hp) at 2,300 rpm takeoff power</li> <li>459 kW (615 hp) at 1,700 m (5,580 ft)</li> <li><b><a href="/wiki/Power_density" title="Power density">Specific power</a>:</b> 25.5 kW/L (0.56 hp/in³)</li> <li><b><a href="/wiki/Compression_ratio" title="Compression ratio">Compression ratio</a>:</b> 6.4:1</li> <li><b><a href="/wiki/Power-to-weight_ratio" title="Power-to-weight ratio">Power-to-weight ratio</a>:</b> 1.07 kW/kg (0.65 hp/lb)</li></ul> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Shvetsov_ASh-21&action=edit&section=4" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p> <b>Comparable engines</b> </p> <ul><li><a href="/wiki/Wright_R-1300_Cyclone_7" title="Wright R-1300 Cyclone 7">Wright R-1300 Cyclone 7</a></li></ul> <p><b>Related lists</b> </p> <ul><li><a href="/wiki/List_of_aircraft_engines" title="List of aircraft engines">List of aircraft engines</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Shvetsov_ASh-21&action=edit&section=5" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1235681985">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:var(--background-color-interactive-subtle,#f8f9fa);display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output 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<ul><li><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFGunston1986" class="citation book cs1">Gunston, Bill (1986). <i>World Encyclopedia of Aero Engines</i>. Wellingborough: Patrick Stephens. p. 175.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=World+Encyclopedia+of+Aero+Engines&rft.place=Wellingborough&rft.pages=175&rft.pub=Patrick+Stephens&rft.date=1986&rft.aulast=Gunston&rft.aufirst=Bill&rfr_id=info%3Asid%2Fen.wikipedia.org%3AShvetsov+ASh-21" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKotelnikov2005" class="citation book cs1">Kotelnikov, Vladimir (2005). <i>Russian Piston Aero Engines</i>. 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aria-labelledby="Aviadvigatel,_Soloviev_and_Shvetsov_aero_engines" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar 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D-25">D-25</a></li> <li><a href="/wiki/Soloviev_D-30" title="Soloviev D-30">D-30</a></li> <li><a href="/wiki/Aviadvigatel_PD-14" title="Aviadvigatel PD-14">PD-14</a></li> <li><a href="/w/index.php?title=Aviadvigatel_PS-12&action=edit&redlink=1" class="new" title="Aviadvigatel PS-12 (page does not exist)">PS-12</a></li> <li><a href="/wiki/Soloviev_D-30" title="Soloviev D-30">PS-30</a></li> <li><a href="/wiki/Aviadvigatel_PS-90" title="Aviadvigatel PS-90">PS-90</a></li> <li><a href="/wiki/Aviadvigatel_PD-14" title="Aviadvigatel PD-14">PD-18R</a></li> <li><a href="/w/index.php?title=Aviadvigatel_PD-30&action=edit&redlink=1" class="new" title="Aviadvigatel PD-30 (page does not exist)">PD-30</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Radial_engines" class="mw-redirect" title="Radial engines">Radial engines</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Shvetsov_ASh-2" title="Shvetsov ASh-2">ASh-2</a></li> <li><a class="mw-selflink selflink">ASh-21</a></li> <li><a href="/wiki/Shvetsov_ASh-62" title="Shvetsov ASh-62">ASh-62</a></li> <li><a href="/wiki/Shvetsov_ASh-73" title="Shvetsov ASh-73">ASh-73</a></li> <li><a href="/wiki/Shvetsov_ASh-82" title="Shvetsov ASh-82">ASh-82</a></li> <li><a href="/wiki/Shvetsov_M-11" title="Shvetsov M-11">M-11</a></li> <li><a href="/wiki/Bristol_Jupiter" title="Bristol Jupiter">M-22</a></li> <li><a href="/wiki/Shvetsov_M-25" title="Shvetsov M-25">M-25</a></li> <li><a href="/wiki/Shvetsov_ASh-62" title="Shvetsov ASh-62">M-63</a></li> <li><a href="/w/index.php?title=Shvetsov_M-64&action=edit&redlink=1" class="new" title="Shvetsov M-64 (page does not exist)">M-64</a></li> <li><a href="/w/index.php?title=Shvetsov_M-70&action=edit&redlink=1" class="new" title="Shvetsov M-70 (page does not exist)">M-70</a></li> <li><a href="/wiki/Shvetsov_M-71" title="Shvetsov M-71">M-71</a></li> <li><a href="/w/index.php?title=Shvetsov_M-72&action=edit&redlink=1" class="new" title="Shvetsov M-72 (page does not exist)">M-72</a></li> <li><a href="/w/index.php?title=Shvetsov_M-80&action=edit&redlink=1" class="new" title="Shvetsov M-80 (page does not exist)">M-80</a></li> <li><a href="/w/index.php?title=Shvetsov_M-81&action=edit&redlink=1" class="new" title="Shvetsov M-81 (page does not exist)">M-81</a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Shvetsov_ASh-21&oldid=1101700936">https://en.wikipedia.org/w/index.php?title=Shvetsov_ASh-21&oldid=1101700936</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" 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